From 9fb66a1bc16c7a4b652880335fd54d3db799091c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dag-Erling=20Sm=C3=B8rgrav?= <des@des.no>
Date: Fri, 29 Aug 2025 17:16:26 +0200
Subject: [PATCH 1/1] tzset: Only set FROMENV flag if the name came the
 environment

---
 localtime.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/localtime.c b/localtime.c
index 96737ca6..e1d8317b 100644
--- a/localtime.c
+++ b/localtime.c
@@ -1472,6 +1472,7 @@ static void
 tzset_unlocked(void)
 {
   char const *name = getenv("TZ");
+  int tzloadflags = TZLOAD_TZSTRING | (name ? TZLOAD_FROMENV : 0);
   struct state *sp = lclptr;
   int lcl = name ? strlen(name) < sizeof lcl_TZname : -1;
   if (lcl < 0
@@ -1483,7 +1484,7 @@ tzset_unlocked(void)
     lclptr = sp = malloc(sizeof *lclptr);
 # endif
   if (sp) {
-    if (zoneinit(sp, name, TZLOAD_FROMENV | TZLOAD_TZSTRING) != 0) {
+    if (zoneinit(sp, name, tzloadflags) != 0) {
       zoneinit(sp, "", 0);
       strcpy(sp->chars, UNSPEC);
     }
-- 
2.50.1